cc/surfaces/surface_display_output_surface.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "cc/surfaces/surface_display_output_surface.h"
   6
   7 #include "cc/output/compositor_frame.h"
   8 #include "cc/output/compositor_frame_ack.h"
   9 #include "cc/surfaces/display.h"
  10 #include "cc/surfaces/onscreen_display_client.h"
  11 #include "cc/surfaces/surface.h"
  12 #include "cc/surfaces/surface_manager.h"
  13
  14 namespace cc {
  15
  16 SurfaceDisplayOutputSurface::SurfaceDisplayOutputSurface(
  17     SurfaceManager* surface_manager,
  18     SurfaceIdAllocator* allocator,
  19     const scoped_refptr<ContextProvider>& context_provider)
  20     : OutputSurface(context_provider),
  21       display_client_(NULL),
  22       surface_manager_(surface_manager),
  23       factory_(surface_manager, this),
  24       allocator_(allocator) {
  25   capabilities_.delegated_rendering = true;
  26   capabilities_.max_frames_pending = 1;
  27   capabilities_.can_force_reclaim_resources = true;
  28   // Frame always needs to be swapped because forced resource reclaiming
  29   // destroys the Display's copy.
  30   capabilities_.draw_and_swap_full_viewport_every_frame = true;
  31 }
  32
  33 SurfaceDisplayOutputSurface::~SurfaceDisplayOutputSurface() {
  34   client_ = NULL;
  35   if (!surface_id_.is_null()) {
  36     factory_.Destroy(surface_id_);
  37   }
  38 }
  39
  40 void SurfaceDisplayOutputSurface::ReceivedVSyncParameters(
  41     base::TimeTicks timebase,
  42     base::TimeDelta interval) {
  43   CommitVSyncParameters(timebase, interval);
  44 }
  45
  46 void SurfaceDisplayOutputSurface::SwapBuffers(CompositorFrame* frame) {
  47   gfx::Size frame_size =
  48       frame->delegated_frame_data->render_pass_list.back()->output_rect.size();
  49   if (frame_size != display_size_) {
  50     if (!surface_id_.is_null()) {
  51       factory_.Destroy(surface_id_);
  52     }
  53     surface_id_ = allocator_->GenerateId();
  54     factory_.Create(surface_id_);
  55     display_size_ = frame_size;
  56   }
  57   display_client_->display()->SetSurfaceId(surface_id_,
  58                                            frame->metadata.device_scale_factor);
  59
  60   scoped_ptr<CompositorFrame> frame_copy(new CompositorFrame());
  61   frame->AssignTo(frame_copy.get());
  62   factory_.SubmitFrame(
  63       surface_id_, frame_copy.Pass(),
  64       base::Bind(&SurfaceDisplayOutputSurface::SwapBuffersComplete,
  65                  base::Unretained(this)));
  66
  67   client_->DidSwapBuffers();
  68 }
  69
  70 bool SurfaceDisplayOutputSurface::BindToClient(OutputSurfaceClient* client) {
  71   DCHECK(client);
  72   DCHECK(display_client_);
  73   client_ = client;
  74   // Avoid initializing GL context here, as this should be sharing the
  75   // Display's context.
  76   return display_client_->Initialize();
  77 }
  78
  79 void SurfaceDisplayOutputSurface::ForceReclaimResources() {
  80   if (!surface_id_.is_null()) {
  81     scoped_ptr<CompositorFrame> empty_frame(new CompositorFrame());
  82     empty_frame->delegated_frame_data.reset(new DelegatedFrameData);
  83     factory_.SubmitFrame(surface_id_, empty_frame.Pass(),
  84                          SurfaceFactory::DrawCallback());
  85   }
  86 }
  87
  88 void SurfaceDisplayOutputSurface::ReturnResources(
  89     const ReturnedResourceArray& resources) {
  90   CompositorFrameAck ack;
  91   ack.resources = resources;
  92   if (client_)
  93     client_->ReclaimResources(&ack);
  94 }
  95
  96 void SurfaceDisplayOutputSurface::SwapBuffersComplete(SurfaceDrawStatus drawn) {
  97   if (client_ && !display_client_->output_surface_lost())
  98     client_->DidSwapBuffersComplete();
  99 }
 100
 101 }  // namespace cc